package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.message.NewsAutoScanConstants;
import com.heima.common.constants.message.WmNewsMessageConstants;
import com.heima.common.constants.wemedia.WemediaConstants;
import com.heima.common.exception.CustException;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.threadlocal.WmThreadLocalUtils;
import com.heima.model.wemedia.dtos.NewsAuthDto;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.model.wemedia.vos.WmNewsVo;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

@Service
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {
    @Value("${file.oss.web-site}")
    String webSite;

    /**
     * 查询所有自媒体文章
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmNewsPageReqDto dto) {
        //1 参数检查
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        dto.checkParam();
        //2 条件封装执行查询
        LambdaQueryWrapper<WmNews> wrapper = new LambdaQueryWrapper<>();
        // 文章标题模糊查询
        wrapper.like(StringUtils.isNotBlank(dto.getKeyword()), WmNews::getTitle, dto.getKeyword());
        // 频道id
        wrapper.eq(dto.getChannelId() != null, WmNews::getChannelId, dto.getChannelId());
        // 文章状态
        wrapper.eq(dto.getStatus() != null, WmNews::getStatus, dto.getStatus());
        // 发布时间 >= 开始时间
        wrapper.ge(dto.getBeginPubDate() != null, WmNews::getPublishTime, dto.getBeginPubDate());
        // 发布时间 <= 开始时间
        wrapper.le(dto.getEndPubDate() != null, WmNews::getPublishTime, dto.getBeginPubDate());
        // 当前自媒体人文章
        WmUser user = WmThreadLocalUtils.getUser();
        if (user == null) {
            CustException.cust(AppHttpCodeEnum.NEED_LOGIN);
        }
        wrapper.eq(WmNews::getUserId, user.getId());
        // 按照创建日期倒序
        wrapper.orderByDesc(WmNews::getCreatedTime);
        // 分页条件构建
        Page<WmNews> page = new Page<>(dto.getPage(), dto.getSize());
        //3 执行查询
        IPage<WmNews> pageResult = page(page, wrapper);
        //4 返回封装查询结果
        PageResponseResult result = new PageResponseResult(dto.getPage(), dto.getSize(), pageResult.getTotal());
        result.setData(pageResult.getRecords());
        // 处理文章图片 
        result.setHost(webSite);
        return result;
    }

    @Autowired
    KafkaTemplate kafkaTemplate;

    @Override
    public ResponseResult submitNews(WmNewsDto wmNewsDto) {
        // 1 参数校验
        if (wmNewsDto == null || StringUtils.isBlank(wmNewsDto.getContent())) {
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID, "文章内容不能为空");
        }
        Short sta = wmNewsDto.getStatus();
        if (sta == null || (sta.intValue() != 0 && sta.intValue() != 1)) {
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID, "文章状态错误");
        }
        WmUser user = WmThreadLocalUtils.getUser();
        if (user == null) {
            CustException.cust(AppHttpCodeEnum.NEED_LOGIN);
        }
        // 2 保存或修改文章
        WmNews wmNews = new WmNews();
        // 将dto参数里面的值设置到wmNews
        BeanUtils.copyProperties(wmNewsDto, wmNews);
        //如果文章布局是自动，需要设置为null
        if (wmNewsDto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            wmNews.setType(null);
        }
        // 处理dto参数 images封面集合 转换成 字符串
        String images = imageListToStr(wmNewsDto.getImages(), webSite);
        wmNews.setImages(images);
        saveWmNews(wmNews);
        // TODO 3.1 抽取文章中关联的图片路径
        List<Map> contents = JSON.parseArray(wmNewsDto.getContent(), Map.class);
        List<String> materials = parseContentImages(contents);

        // TODO 3.2 关联文章内容中的图片和素材关系
        Short status = wmNewsDto.getStatus();
        if (status == WmNews.Status.SUBMIT.getCode() && materials.size() > 0) {
            saveRelativeInfo(materials, wmNews.getId(), WemediaConstants.WM_CONTENT_REFERENCE);
        }

        // TODO 3.3 关联文章封面中的图片和素材关系
      /*  if (status == WmNews.Status.SUBMIT.getCode()) {
            saveRelativeInfoForCover(wmNewsDto,materials, wmNews);
        }*/
        if (status == WmNews.Status.SUBMIT.getCode()) {
            saveRelativeInfoForCover(wmNewsDto, materials, wmNews);
            Map<String, Integer> map = new HashMap<>();
            map.put("newsId", wmNews.getId());
            kafkaTemplate.send(NewsAutoScanConstants.WM_NEWS_AUTO_SCAN_TOPIC, JSON.toJSONString(map));
        }
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult findWmNewsById(Integer id) {
        //1 参数检查
        if (id == null) {
            throw new CustomException(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2 执行查询
        WmNews wmNews = getById(id);
        if (wmNews == null) {
            throw new CustomException(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        //3 返回结果
        ResponseResult result = ResponseResult.okResult(wmNews);
        result.setHost(webSite);
        return result;
    }

    @Override
    public ResponseResult delNews(Integer id) {
        //1.检查参数
        if (id == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID, "文章Id不可缺少");
        }
        //2.获取数据
        WmNews wmNews = getById(id);
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "文章不存在");
        }
        //3.判断当前文章的状态  status==9  enable == 1
        if (wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())
                && wmNews.getEnable().equals(WemediaConstants.WM_NEWS_UP)) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "文章已发布，不能删除");
        }
        //4.去除素材与文章的关系
        wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId, wmNews.getId()));
        //5.删除文章
        removeById(wmNews.getId());
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    @Override
    public ResponseResult downOrUp(WmNewsDto dto) {
        //1.检查参数
        if (dto == null || dto.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //2.查询文章
        WmNews wmNews = getById(dto.getId());
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "文章不存在");
        }

        //3.判断文章是否发布
        if (!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "当前文章不是发布状态，不能上下架");
        }

        //4.修改文章状态，同步到app端（后期做）TODO
       // wmNews.setEnable(dto.getEnable());
        //updateById(wmNews);

        if (dto.getEnable() != null && dto.getEnable() > -1 && dto.getEnable() < 2) {
            update(Wrappers.<WmNews>lambdaUpdate().eq(WmNews::getId, dto.getId())
                    .set(WmNews::getEnable, dto.getEnable()));
        }

        //上下架
        if (wmNews.getArticleId() != null) {
            HashMap<String, Object> map = new HashMap<>();
            map.put("enable", dto.getEnable());
            map.put("articleId", wmNews.getArticleId());
            kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC, JSON.toJSONString(map));

        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    @Override
    public List<Integer> findRelease() {
        //查询状态为4或为8的数据且发布时间小于当前时间
        LambdaQueryWrapper<WmNews> wrapper = Wrappers.lambdaQuery();

        LambdaQueryWrapper<WmNews> select = wrapper.in(WmNews::getStatus, 4, 8)
                .le(WmNews::getCreatedTime, new Date())
                .select(WmNews::getId);

        List<WmNews> list = list(select);

        List<Integer> collect = list.stream().map(WmNews::getId).collect(Collectors.toList());
        return collect;
    }
    @Autowired
    WmNewsMapper wmNewsMapper;

    @Override
    public ResponseResult findList(NewsAuthDto dto) {
        //1.检查参数
        dto.checkParam();
        //记录当前页
        Integer currentPage = dto.getPage();
        //设置起始页
        dto.setPage((currentPage - 1) * dto.getSize());
        if (StringUtils.isNotBlank(dto.getTitle())) {
            dto.setTitle("%"+dto.getTitle()+"%");
        }
        //2.调用mapper 进行查询
        List<WmNewsVo> wmNewsVoList = wmNewsMapper.findListAndPage(dto);

        Long count = wmNewsMapper.findListCount(dto);

        //3. 封装分页返回结果
        PageResponseResult responseResult = new PageResponseResult(currentPage, dto.getSize(), count, wmNewsVoList);
        responseResult.setHost(webSite);
        return responseResult;
    }

    @Autowired
    WmUserMapper wmUserMapper;

    @Override
    public ResponseResult findWmNewsVo(Integer id) {
        //1.检查参数
        if (id == null) {
            CustException.cust(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        //2.查询文章信息
        WmNews wmNews = this.getById(id);
        if (wmNews == null) {
            CustException.cust(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        //3.查询作者
        WmUser wmUser = null;
        if (wmNews.getUserId()!=null) {
            wmUser = wmUserMapper.selectById(wmNews.getUserId());
        }
        //4.封装vo 信息返回
        WmNewsVo wmNewsVo = new WmNewsVo();
        BeanUtils.copyProperties(wmNews, wmNewsVo);
        if (wmUser != null) {
            wmNewsVo.setAuthorName(wmUser.getName());
        }
        ResponseResult responseResult = ResponseResult.okResult(wmNewsVo);
        responseResult.setHost(webSite);
        return responseResult;
    }

    @Override
    public ResponseResult updateStatus(Short status, NewsAuthDto dto) {
       //1. 检查参数 id值
        if (dto.getId() == null || dto == null) {
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID);
        }
        // 2.根据id 查询 wmNews
        WmNews wmNews = getById(dto.getId());
        if (wmNews == null) {
            CustException.cust(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 3. 修改 wmNews 状态
        wmNews.setStatus(status);
        if (StringUtils.isNotBlank(dto.getMsg())) {
            wmNews.setReason(dto.getMsg());
        }
        // 4. 返回结果
        updateById(wmNews);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    private void saveRelativeInfoForCover(WmNewsDto wmNewsDto, List<String> materials, WmNews wmNews) {
        // 前端用户选择的图
        List<String> images = wmNewsDto.getImages();

        // 自动获取封面 ****
        if (WemediaConstants.WM_NEWS_TYPE_AUTO.equals(wmNewsDto.getType())) {
            int materialSize = materials.size();
            if (materialSize > 0 && materialSize <= 2) {  // 单图
                images = materials.stream().limit(1).collect(Collectors.toList());
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
            } else if (materialSize > 2) { // 多图
                images = materials.stream().limit(3).collect(Collectors.toList());
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
            } else {  // 无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAGE);
            }

            if (images != null && images.size() > 0) {
                // 将图片集合 转为字符串  url1,url2,url3
                wmNews.setImages(imageListToStr(images, webSite));
            }
            updateById(wmNews);
        }
        // 保存图片列表和素材的关系
        if (images != null && images.size() > 0) {
            images = images.stream().map(x -> x.replace(webSite, "")
                    .replace(" ", "")).collect(Collectors.toList());

            saveRelativeInfo(images, wmNews.getId(), WemediaConstants.WM_IMAGE_REFERENCE);
        }
    }

    @Autowired
    WmMaterialMapper wmMaterialMapper;

    //保存素材和文章关系
//  * @param materials  素材列表
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        //1 查询文章内容中的图片对应的素材ID
        List<WmMaterial> dbmaterials = wmMaterialMapper.selectList(
                Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials).eq(WmMaterial::getUserId, WmThreadLocalUtils.getUser().getId()));

        //2 校验素材列表
        if (dbmaterials == null || dbmaterials.size() == 0) {
            throw new CustomException(AppHttpCodeEnum.DATA_NOT_EXIST);
        }

        List<Integer> materialIds = new ArrayList<>();
        // {"1.jpg":55,"2.jpg":56}  草稿中的图片列表大于等于 数据库的素材
        Map<String, Integer> matreialMap = dbmaterials.stream()
                .collect(Collectors.toMap(WmMaterial::getUrl, WmMaterial::getId));

        for (String material : materials) {
            Integer id = matreialMap.get(material);
            if (id == null) { // 数据库中已删除改图片
                throw new CustomException(AppHttpCodeEnum.DATA_NOT_EXIST);
            }
            materialIds.add(id);
        }
        //3 保存素材关系
        wmNewsMaterialMapper.saveRelations(materialIds, newsId, type);
    }

    //抽取文章内容中 所引用的所有图片
    //     * @param contents 文章内容
    private List<String> parseContentImages(List<Map> contents) {
        // 遍历文章内容   将所有 type为image的 value获取出来  去除前缀路径
        return contents.stream()
                // 过滤type=image所有的集合
                .filter(map -> map.get("type").equals(WemediaConstants.WM_NEWS_TYPE_IMAGE))
                // 获取到image下的value  图片url
                .map(x -> (String) x.get("value"))
                // 图片url去除前缀
                .map(url -> url.replace(webSite, "").replace(" ", ""))
                // sretam 转成list集合
                .collect(Collectors.toList());
    }

    /**
     * 图片列表转字符串，并去除图片前缀
     */
    private String imageListToStr(List<String> images, String webSite) {
        return images.stream()  // 获取流
                .map((url) -> url.replace(webSite, ""))  // 对流数据的中间操作
                .collect(Collectors.joining(","));
    }

    @Autowired
    WmNewsMaterialMapper wmNewsMaterialMapper;

    /**
     * 保存或修改文章
     */
    private void saveWmNews(WmNews wmNews) {
        wmNews.setCreatedTime(new Date());
        wmNews.setUserId(WmThreadLocalUtils.getUser().getId());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable(WemediaConstants.WM_NEWS_UP); // 上架
        if (wmNews.getId() == null) { // 保存操作
            save(wmNews);
        } else {  // 修改
            // 当前文章 和 素材关系表数据删除
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery()
                    .eq(WmNewsMaterial::getNewsId, wmNews.getId()));
            updateById(wmNews);
        }
    }
}